US2601075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing substituted cyclohexanes
Assignee: Phillips Petroleum Co
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Filing: 1948-11-15
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Granted: 1952-06-17
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Expires: 1968-11-15
Abstract
No abstract record available.
Inventors
- 👤 John E Wicklatz
- 👤 James N Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:54
CPC Classifications
C; C07; C07C; C07C22/00; C07C13/00; C07C13/02; C07C13/16; C07C13/18; C07C13/19; C07C2601/00; C07C2601/12; C07C2601/14; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/932; Y10S585/935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD FOR THE PRODUCTION OF 1,2-DIMETHYLENECYCLOHEXENE, WHICH COMPRISES THE STEPS OF CONDENSING 1,3-BUTADIENE WITH MALEIC ANHYDRIDE TO PRODUCE TETRAHYDROPHTHALIC ANHYDRIDE, HYDROGENATING SAID TETRAHYDROPHTHALIC ANHYDRIDE TO PRODUCE HEXAHYDROPHTHALIC ANHYDRIDE, ESTERIFYING SAID HEXAHYDROPHTHALIC ANHYDRIDE TO PRODUCE DIETHYL HEXAHYDROPHTHALATE, REACTING SAID DIETHYL HEXAHYDROPHTHALATE WITH SODIUM IN THE PRESENCE OF ETHANOL TO FORM 1,2-BIS-(HYDROXYMETHYL)-CYCLOHEXANE, REACTING SAID 1,2-BIS-(HYDROXYMETHYL)CYCLOHEXANE WITH IODINE IN THE PRESENCE OF PHOSPHORUS TO PRODUCE 1,2-BIS-(IODOMETHYL)-CYCLOHEXANE, AND DEHYDROHALOGENATING SAID 1,2-BIS(IODOMETHYL)-CYCLOHEXANE TO PRODUCE 1,2-DIMETHYLENECYCLOHEXANE.
Claim 2
Independent Claim
71 words
A METHOD FOR THE PRODUCTION OF 1,2-DIMETHYLENECYCLOHEXENE, WHICH COMPRISES THE STEPS OF CONDENSING 1,3-BUTADIENE WITH MALEIC ANHYDRIDE TO PRODUCE TETRAHYDROPHTHALIC ANHYDRIDE, HYDROGENATING SAID TETRAHYDROPHTHALIC ANHYDRIDE TO PRODUCE HEXAHYDROPHTHALIC ANHYDRIDE, ESTERIFYING SAID HEXAHYDROPHTHALIC ANHYDRIDE TO PRODUCE DIETHYL HEXAHYDROPHTHALATE, REACTING SAID DIETHYL HEXAHYDROPHTHALATE WITH SODIUM IN THE PRESENCE OF ETHANOL TO FORM 1,2-BIS-(HYDROXYMETHYL)-CYCLOHEXANE, REACTING SAID 1,2-BIS-(HYDROXYMETHYL)CYCLOHEXANE WITH IODINE IN THE PRESENCE OF PHOSPHORUS TO PRODUCE 1,2-BIS-(IODOMETHYL)-CYCLOHEXANE, AND DEHYDROHALOGENATING SAID 1,2-BIS(IODOMETHYL)-CYCLOHEXANE TO PRODUCE 1,2-DIMETHYLENECYCLOHEXANE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |